Like I say, the game is very much into existentialism, it's not about changing the society nor the world, but rather what would you do if you are put in that world. (with restrictions in the case of game being restrictive in terms of choices) Phantom Liberty is about what would you do if you are told that there is a cure but then stuck in a hard rock of whether to trust random person with immense power or US (NUSA) that promise to cure V (Player character).